1.Check whether the DTC is set again.
(1) Erase the set DTC.
(2) Operate the cruise control and speed limiter functions.
(3) Check whether the DTC is set again.
Is the DTC set?
The trouble can be an intermittent malfunction (Refer to General Information - How to Use Troubleshooting/Inspection Service Points, How to Cope with Intermittent Malfunctions HOW TO COPE WITH INTERMITTENT MALFUNCTIONS).